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Modern technology assists disabled competitors: the first “Cybathlon” special competition in Zürich

Erdmann Włodzimierz S., Aschenbrenner Piotr, Giovanis Vasilios

Acta of Bioengineering and Biomechanics

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2020

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Vol. 22, no. 3

69--75

EN

Purpose: The purpose of the study was presentation of modern bioengineering technology in order to help people with severe disabilities. Methods: Bioengineering industry can offer severely disabled people several devices in order to enable them to take part in the competition different than Paralympics. The first international competition for people with disabilities supported by modern assistive technology, such as sensors, motors, displays were allowed to compete in Cybathlon held in Zürich in 2016. About 70 athletes and their teams from 25 countries appeared at the event. Results: There were six disciplines (races): 1) Powered Arms (Upper Extremities) Prostheses Race, 2) Powered Legs (Lower Extremities) Prostheses Race, 3) Powered Wheelchair Race, 4) Powered Exoskeleton Race, 5) Functional Electrical Stimulation Bike Race, 6) Brain-Computer Interface Race. About a quarter of the teams represented industry and the rest represented university laboratories. Conclusions: The competition was a success. The organisers have decided for it to be organized every four years, just like the Olympic Games for able bodied competitors. The main inventor of the event professor Robert Riener from Zürich Polytechnic (ETHZ) said assistive technology should: a) be user-friendly b) to function well, c) be affordable, d) to be used within the barrier-free environment.

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Bydgoski egzoszkielet na rękę – aspekty mechaniczne

Kopowski Jakub, Mikołajewski Dariusz, Macko Marek, Rojek Izabela

Mechanik

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2019

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R. 92, nr 4

271--274

PL

Przedstawiono własną konstrukcję egzoszkieletu na rękę. Omówiono ją z mechanicznego punktu widzenia: wychodząc od ograniczeń narzucanych przez biomechanikę zdrowego człowieka poprzez możliwe deficyty funkcjonalne i ich kompensację z użyciem mechaniki egzoszkieletu aż po ograniczenia materiałowe i technologiczne. Opisano wykorzystanie inżynierii odwrotnej w celu zachowania indywidualizacji własności mechanicznych przy silnym zindywidualizowaniu mechaniki ręki, zwłaszcza patologicznej.

EN

The own study on hand exoskeleton is presented. It is described from mechanical point of view: starting from constraints caused by healthy human biomechanics, through possible functional deficits and their compensation by exoskeleton’s biomechanics, up to material and technological limitations. There is described an application of the reverse engineering aiming at personalization of the mechanical features taking into consideration huge individualization of the hand mechanics, including pathological changes.

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An Electrooculography based Human Machine Interface for wheelchair control

Choudhari Ajit M., Porwal Prasanna, Jonnalagedda Venkatesh, Mériaudeau Fabrice

Biocybernetics and Biomedical Engineering

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2019

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Vol. 39, no. 3

673--685

EN

This paper presents a novel single channel Electrooculography (EOG) based efficient Human–Machine Interface (HMI) for helping the individuals suffering from severe paralysis or motor degenerative diseases to regain mobility. In this study, we propose a robust system that generates control command using only one type of asynchronous eye activity (voluntary eye blink) to navigate the wheelchair without a need of graphical user interface. This work demonstrates a simple but robust and effective multi-level threshold strategy to generate control commands from multiple features associated with the single, double and triple voluntary eye blinks to control predefined actions (forward, right turn, left turn and stop). Experimental trials were carried out on the able-bodied and disabled subjects to validate the universal applicability of the algorithms. It achieved an average command detection and execution accuracy of 93.89% with information transfer rate (ITR) of 62.64 (bits/ min) that shows the robust, sensitive and responsive features of the presented interface. In comparison with the established state of art similar HMI systems, our system achieved a better trade-off between higher accuracy and better ITR and while maintaining better performance in all qualitative and quantitative criteria. The results confirm that the proposed system offers a user-friendly, cost-effective and reliable alternative to the existing EOG-based HMI.

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Badania temperatury skrawania w procesie obróbki metodą TCEM

Brukwicki J.

Zeszyty Naukowe Politechniki Poznańskiej. Mechanika

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2002

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Nr 48

5-20

PL

W artykule zaprezentowano wyniki pomiarów temperatury skrawania w procesie obróbki skrawaniem z zastosowaniem metody TCEM -technologii wspomagającej, polegającej na doprowadzeniu dodatkowego Prądu technologicznego do strefy kontaktu przedmiotu obrabianego z narzędziem celem uplastycznienia strefy dekohezji. Przedstawiono sposoby interpretacji temperatury występującej w strefie kontaktu przedmiotu obrabianego z narzędziem podczas obróbki metodą TCEM, metodykę pomiaru temperatury opartą na technice promieniowania podczerwonego z wykorzystaniem metody pirometrycznej oraz wyniki jej pomiarów.

EN

In paper the research results of the cutting temperature measurements in the cutting process with the use of TCEM method have been presented. TCEM is the enhanced technology with the :flow of the additional current via the contact zone of workiece with the cutting tool. It have been described the methods of temperature interpretation, existed in the contact zone during cutting with the use of TCEM method. The methodics of the temperature measurement based on the infrared radiation technique with the use of pirometry and the temperuture research results have been showed.